CN103863298A - Method and system for controlling driving mode conversion of a hybrid electric vehicle - Google Patents

Method and system for controlling driving mode conversion of a hybrid electric vehicle Download PDF

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Publication number
CN103863298A
CN103863298A CN201310388425.XA CN201310388425A CN103863298A CN 103863298 A CN103863298 A CN 103863298A CN 201310388425 A CN201310388425 A CN 201310388425A CN 103863298 A CN103863298 A CN 103863298A
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China
Prior art keywords
state
transmission clutch
driving mode
torque
electrical motor
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Granted
Application number
CN201310388425.XA
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Chinese (zh)
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CN103863298B (en
Inventor
金尚准
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Hyundai Motor Co
Kia Corp
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Hyundai Motor Co
Kia Motors Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/40—Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/20—Control strategies involving selection of hybrid configuration, e.g. selection between series or parallel configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/182—Selecting between different operative modes, e.g. comfort and performance modes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B60K2006/4825—Electric machine connected or connectable to gearbox input shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/02—Clutches
    • B60W2510/0208—Clutch engagement state, e.g. engaged or disengaged
    • B60W2510/0216—Clutch engagement rate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/08—Electric propulsion units
    • B60W2510/081—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/02—Clutches
    • B60W2710/027—Clutch torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/08—Electric propulsion units
    • B60W2710/081—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/08—Electric propulsion units
    • B60W2710/083—Torque
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S903/00—Hybrid electric vehicles, HEVS
    • Y10S903/902—Prime movers comprising electrical and internal combustion motors

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Automation & Control Theory (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

A method and system for controlling a running mode change that prevent shock generated when releasing an engine clutch in changing from a running mode to another running mode. The method includes detecting, by a controller, a running mode change occurring in the hybrid vehicle and determining whether to change a state of the engine clutch from a lock-up state to an open state while the running mode change is being processed. The controller is further configured to slip-control the engine clutch to prevent torque occurring at a point in time when the engine clutch is changed to the open state from being transmitted to a driving shaft connected to the transmission, when the state of the engine clutch is determined to be changed from the lock-up state to the open state.

Description

The method and system of changing for controlling the driving mode of hybrid electric vehicle
Technical field
The present invention relates to a kind of method and system of changing for controlling the driving mode of hybrid electric vehicle, it comprises the release of the engine clucht of processing hybrid electric vehicle.More specifically, the present invention relates to a kind of like this method and system of changing for controlling the driving mode of hybrid electric vehicle, when it prevents from discharging engine clucht being transformed into another kind of driving mode from a kind of driving mode, produce vibrations.
Background technology
Hybrid electric vehicle is by utilizing from the power of combustion engine with from the work about electric power of battery.Especially, hybrid electric vehicle is designed to combination effectively and utilizes combustion engine and the power of electrical motor.For example, as shown in Figure 1, hybrid electric vehicle comprises driving engine 10, electrical motor 20, engine clucht 30, change-speed box 40, differential gear unit 50, battery 60, integrated actuating electric generator (ISG) 70 and wheel 80.Transmission of power between engine clucht 30 control engines 10 and electrical motor 20, integrated actuating electric generator (ISG) 70 fire an engines 10 or produce electric power by the output of driving engine 10.
As further illustrated, hybrid electric vehicle comprises: the hybrid power control unit (HCU) 200 of operation hybrid electric vehicle; The control unit of engine (ECU) 110 of operation driving engine 10; The motor control unit (MCU) 120 of operating motor 20; The transmission control unit (TCU) 140 of operation change-speed box 40; And the battery control unit of actuating battery 60 (BCU) 160.Battery control unit 160 also can be known as battery management system (BMS).Integrated actuating electric generator 70 also can be known as starting/generator motor or hybrid power starter generator.
Hybrid electric vehicle can be worked as active force and using the torque of electrical motor 20 using the torque of driving engine 10 in battery-driven car (EV) pattern, the utilization of the electric power such as utilizing electrical motor 20 completely under the driving mode such as hybrid electric vehicle (HEV) pattern and the regenerative brake in braking procedure or in the time that vehicle moves by inertia (RB) pattern of auxiliary power.Under RB pattern, collect braking and inertia energy by the generating of electrical motor 20, and utilize collected energy to charge for battery 60.
Hybrid electric vehicle can be changed driving mode according to the motoring condition in the time being driven.When the driving mode of hybrid electric vehicle converts EV pattern to or walks around while changing RB pattern into from HEV pattern from HEV pattern, engine clucht 30 is released, and the power therefore cutting off between driving engine 10 and electrical motor 20 is connected.When the driving mode of hybrid electric vehicle is when HEV pattern is transformed into EV pattern or be transformed into RB pattern from HEV pattern, the operation of driving engine 10 stops.
In the time that engine clucht 30 is released, engine clucht 30 is worked as shown in Figure 2.For example, the state of engine clucht 30 can be from lock-out state (Fig. 2 (A)), be transformed into off-state (Fig. 2 (C)) via sliding mode (Fig. 2 (B)).Under the lock-out state (Fig. 2 (A)) of engine clucht 30, because driving engine 10 produces mechanical friction torque by inertial rotation power, therefore there is not the torque that is delivered to electrical motor 20 and axle drive shaft.But, when through sliding mode when (Fig. 2 (B)), can transient state in engine clucht 30 (transiently) produce friction torque.The friction torque of this transient state is delivered to electrical motor 20 and axle drive shaft, thereby causes vibrations.These vibrations may affect rideability negatively.
In this part, disclosed above-mentioned information is only in order to strengthen the understanding to background of the present invention, and therefore, it may comprise, and not to be formed in this country be the information of the known prior art of those skilled in the art.
Summary of the invention
The invention provides a kind ofly for controlling the method and system of driving mode of hybrid electric vehicle, it has advantages of and while preventing from discharging engine clucht in the time that a kind of driving mode is transformed into another kind of driving mode, produces vibrations.
One exemplary embodiment of the present invention provide a kind of method of the driving mode conversion of controlling hybrid electric vehicle, this hybrid electric vehicle comprises the engine clucht and the transmission clutch that is connected electrical motor and input shaft of the transmission of power between control engine and electrical motor, and the method can comprise: detect the driving mode conversion of this hybrid electric vehicle by controller; When driving mode conversion is just when processed, determine by controller whether the state of engine clucht is transformed into off-state from lock-out state; And in the time that the state of engine clucht is confirmed as being transformed into off-state from lock-out state, to the engine clucht control of sliding, be passed to the axle drive shaft that is connected in change-speed box by controller with the torque that prevents from producing in the time that engine clucht is switched to off-state; By controller with the target velocity operating motor corresponding with driving mode photograph; And by operating motor, the speed of electrical motor and the input speed of transmission clutch are synchronizeed by controller.
In the time that the state of engine clucht is confirmed as being transformed into off-state from lock-out state, driving mode conversion can be from HEV(hybrid electric vehicle) pattern is to EV(battery-driven car) conversion of pattern.In addition,, in the time that the state of engine clucht is confirmed as being transformed into off-state from lock-out state, driving mode conversion can be from HEV(hybrid electric vehicle) pattern is to RB(regenerative brake) conversion of pattern.
When transmission clutch is during in sliding mode, can independently independently control with the torque of engine clucht and electrical motor the torque of transmission clutch.In the time that the slip of transmission clutch is controlled, electrical motor and transmission clutch can be controlled so as to slip transmitting torque, driving torque and the torque of driver's demand of transmission clutch are equated.
The target velocity of electrical motor can be set to the drive shaft speed of transmission clutch and the summation of RPM object variations amount, and wherein RPM object variations amount can be the state setting based on demand torque and engine clucht.The pressure that is provided for transmission clutch can be controlled so as to the transmitting torque of transmission clutch and demand torque are equated.In the time that driving mode is transformed into RB pattern from HEV pattern, demand torque can become negative torque.
Another exemplary embodiment of the present invention provides a kind of system of changing for controlling the driving mode of hybrid electric vehicle, this hybrid electric vehicle utilizes the power of driving engine and the power of electrical motor to travel, this system can comprise: engine clucht, and it is configured to the transmission of power between control engine and electrical motor; Transmission clutch, it is configured to connect the input shaft of electrical motor and change-speed box, and wherein transmission clutch can be arranged in change-speed box; And control unit, it is configured to produce and shake operating motor, engine clucht and transmission clutch are sailed pattern conversion during to prevent from being expert at.
This control unit can be operated by preset program, and this preset program can comprise the series of orders for carrying out a kind of method, and the method can comprise: detect the driving mode conversion of hybrid electric vehicle; When driving mode conversion is just determining when processed whether the state of engine clucht is transformed into off-state from lock-out state; And in the time that the state of engine clucht is confirmed as being transformed into off-state from lock-out state, to the engine clucht control of sliding, be passed to the axle drive shaft that is connected in change-speed box with the torque that prevents from producing in the time that engine clucht is switched to off-state.
As mentioned above, according to an illustrative embodiment of the invention, can prevent from producing vibrations in the time controlling driving mode conversion, it comprises the processing of the release of the engine clucht of hybrid electric vehicle.In addition, according to exemplary embodiment of the present invention, can be by preventing in the time that the driving mode of hybrid electric vehicle changes, according to the contingent vibrations of the state variation of engine clucht, improving driving performance.
Brief description of the drawings
Fig. 1 is the illustrative diagram illustrating according to the structure of the typical hybrid power car of related art;
Fig. 2 illustrates according to the engine clucht of related art from lock-out state, illustrative diagram by sliding mode to the state of the change procedure of off-state;
Fig. 3 be according to an illustrative embodiment of the invention for controlling the exemplary block diagram of system of driving mode conversion of hybrid electric vehicle;
Fig. 4 be according to an illustrative embodiment of the invention for controlling the exemplary process diagram of method of driving mode conversion of hybrid electric vehicle; And
Fig. 5-7th, illustrates according to an exemplary embodiment of the present invention the exemplary plot of the method for the driving mode conversion for controlling hybrid electric vehicle.
Description of reference numerals
10: driving engine 20: electrical motor
30: engine clucht 40: change-speed box
42: transmission clutch 300: control unit.
Detailed description of the invention
Be understandable that, term used herein " vehicle " or " vehicle " or other similar term comprise power actuated vehicle generally speaking, such as comprising SUV (sport utility vehicle) (SUV), city motor bus, lorry, the passenger vehicle of various commercial vehicles, the ship that comprises various steamers and naval vessel, aircraft etc., and comprise motor vehicle driven by mixed power, electronlmobil, mixed power electric car, hydrogen-powered car and other alternative fuel vehicle (fuel of for example, obtaining) from the resource except oil.As quoted in this article, motor vehicle driven by mixed power is the vehicle with two or more power resources, for example petrol power vehicle and electric-powered vehicle the two.
Although exemplary embodiment is described to utilize multiple unit to carry out exemplary process, but it should be understood that these exemplary process also can be carried out by one or more modules.In addition, it should be understood that term " controller "/" control unit " refers to the hardware unit that comprises memory device and treater.Memory device is configured to memory module, and treater is specially configured into the described module of execution, to carry out one or more processing (will further describe) below.
In addition, control logic of the present invention can be implemented as the non-of short duration computer-readable medium on the computer-readable medium that comprises the executable program instructions of being carried out by treater, controller/control unit etc.The example of computer-readable medium includes, but are not limited to, ROM, RAM, CD (CD)-ROM, tape, flash disk, smart card and optical data storage device.Computer readable recording medium storing program for performing can also be distributed in the network that connects computer system, for example, so that computer-readable medium can, with distributed way,, by teleinformation server or controller area net (CAN), be stored and carry out.
Term used herein is only for describing the object of specific embodiment, and is not intended to limit the present invention.Unless context explicitly points out, otherwise the intention such as singulative " ", " " and " being somebody's turn to do " also comprises plural form as used herein.It should also be understood that, while using terms such as " comprising " and/or " comprising " in this manual, be that meant for illustration exists this feature, integer, step, operation, element and/or assembly, and do not get rid of existence or the increase of one or more further features, integer, step, operation, element, assembly and/or its combination.As used herein, term "and/or" comprises one or more relevant any and all combinations of listing project.
Hereinafter, describe with reference to the accompanying drawings exemplary embodiment of the present invention in detail.As those of skill in the art should be appreciated that described embodiment can be with various different modes corrects, all these embodiment do not deviate from the spirit and scope of the present invention.In addition,, in whole specification sheets, identical Reference numeral refers to identical element.
Fig. 1 is the illustrative diagram that the structure of the typical hybrid power car that can apply according to an exemplary embodiment of the present invention the system for controlling driving mode conversion is shown.
As shown in Figure 1, the typical hybrid power car that can apply according to an exemplary embodiment of the present invention the system for controlling driving mode conversion comprises: driving engine 10, electrical motor 20, the engine clucht 30 that is configured to the transmission of power between control engine 10 and electrical motor 20, change-speed box 40, differential gear unit 50, battery 60 and be configured to fire an engine 10 or the integrated actuating electric generator (ISG) 70 of output generation electric power by driving engine 10.
As further shown, the typical hybrid power car that can apply according to an exemplary embodiment of the present invention the system for controlling driving mode conversion comprises: the mixed control unit (HCU) 200 of operation hybrid electric vehicle; The control unit of engine (ECU) 110 of operation driving engine 10; The motor control unit (MCU) 120 of operating motor 20; The transmission control unit (TCU) 140 of operation change-speed box 40; And the battery control unit of actuating battery 60 (BCU) 160.
Fig. 3 be according to an illustrative embodiment of the invention for controlling the exemplary block diagram of system of driving mode conversion of hybrid electric vehicle.According to the system of changing for controlling the driving mode of hybrid electric vehicle of exemplary embodiment of the present invention, can prevent in the time that the driving mode transformation condition of engine clucht 30 is confirmed as being transformed into off-state from lock-out state vibrations relevant with the release of engine clucht 30 in the time that the transmission clutch 42 of controlling change-speed box 40 by slip is changed driving mode.
Can comprise for the system of controlling the conversion of hybrid electric vehicle driving mode according to an exemplary embodiment of the present invention: engine clucht 30, it is configured to the transmission of power between control engine 10 and electrical motor 20; Transmission clutch (transmission clutch) 42, it is configured to connect the input shaft of electrical motor 20 and change-speed box 40; And control unit 300, it is configured to operating motor 20, engine clucht 30 and transmission clutch 42, sails pattern when conversion vibrations relevant with the disconnection of engine clucht 30 to prevent from being expert at.Transmission clutch 42 can be arranged in change-speed box 40.
Because driving engine 10, electrical motor 20, engine clucht 30, change-speed box 40 and transmission clutch 42 are arranged in typical hybrid power car conventionally, therefore omit in this manual detailed description.
Control unit 300 can comprise one or more treaters or microprocessor, and/or by the hardware of procedure operation, this program comprises the series of orders of the method for carrying out according to an exemplary embodiment of the present invention the driving mode conversion for controlling hybrid electric vehicle, below will describe in detail.
As shown in Figure 7, control unit 300 can comprise: RPM object variations amount (target delta RPM) calculating unit, and it is configured to calculate RPM object variations amount based on the state of demand torque and engine clucht 30; Speed limit unit, it is configured to limited target speed; And proportional integral (PI) (PI) control unit, it is configured to by the present speed of speed limit unit and electrical motor 20, based target speed feedback operation electrical motor 20.
In exemplary embodiment of the present invention, as shown in Figure 1, control unit 300 can comprise: control unit of engine (ECU), and it is configured to operate the driving engine 10 of hybrid electric vehicle; Motor control unit (MCU), it is configured to operating motor 20; Transmission control unit (TCU), it is configured to operate change-speed box 40; And mixed control unit (HCU), it is configured to operate hybrid electric vehicle.
The illustrative methods of changing for controlling driving mode according to an exemplary embodiment of the present invention will be described below, some processing can be carried out by ECU, and other processing can be carried out by MCU, and some other processing also having can be carried out by TCU or HCU.It should be understood, however, that protection scope of the present invention is not limited to hereinafter by the exemplary embodiment of describing.Control unit can be by implementing with the various combination of describing in exemplary embodiment of the present.In addition, ECU, MCU, TCU and HCU can carry out and the different combination of those processing of describing in exemplary embodiment of the present.
Hereinafter, describe with reference to the accompanying drawings the method for changing for controlling the driving mode of hybrid electric vehicle according to an exemplary embodiment of the present invention in detail.
Fig. 4 is the exemplary process diagram of the method for the driving mode conversion of control hybrid electric vehicle according to an illustrative embodiment of the invention.As shown in Figure 4, control unit 300 can be configured to determine at step S110 whether the driving mode of hybrid electric vehicle changes.Control unit 300 can be configured to signal by utilizing the HCU shown in Fig. 1 determines the driving mode conversion of hybrid electric vehicle.When in the time that the driving mode of step S110 hybrid electric vehicle is converted, control unit 300 can be configured at step S120, when driving mode conversion is just when processed, determines whether the state of engine clucht 30 is transformed into off-state from lock-out state.
Control unit 300 can be configured to when driving mode is when HEV pattern is transformed into EV pattern or be transformed into RB pattern from HEV pattern, and the state of engine clucht 30 is confirmed as being transformed into off-state from lock-out state.When the state that is transformed into EV pattern and engine clucht 30 from HEV pattern when the driving mode of hybrid electric vehicle is transformed into off-state from lock-out state, control unit 300 can be configured to slide and control the transmission clutch 42 that is installed in change-speed box 40 and connects the input shaft of electrical motor 20 and change-speed box 40, therefore can prevent that at step S130 the vibrations that produce are delivered to axle drive shaft in the time disconnecting engine clucht 30.
Control unit 300 can be configured to keep the speed of electrical motor 20 and the pressure of transmission clutch 42 at step S130, as shown in Figure 5.In the time that transmission clutch 42 slides, driving torque can be controlled so as to the transmitting torque (transmission torque) of transmission clutch 42 and equate.With reference to Fig. 5 and Fig. 6, by control that transmission clutch 42 is slided, the vibrations that occur in disconnection engine clucht 30 can be processed into and not be passed to axle drive shaft.Control transmission clutch 42 in order to slide, control unit 300 can be configured to keep the speed (as mentioned below) of electrical motor 20.In order to satisfy the demands torque, control unit 300 can be configured to slide and control transmission clutch 42, so that slip transmitting torque, driving torque and the driver's of transmission clutch 42 demand torque equates.
In the time that HEV pattern is converted into RB pattern, produce negative torque (or negative sign torque), therefore, as shown in Figure 5, can be controlled so as to lower than change-speed box input speed higher than the speed of the electrical motor 20 of change-speed box input speed.Control unit 300 can be configured to keep the pressure of transmission clutch 42 to slide, thereby the transmitting torque of transmission clutch 42 and demand torque are equated.The transmitting torque (Tc) of transmission clutch 42 can calculate by following formula:
Tc=(transmission clutch friction coefficient) × (transmission clutch effective radius) × (RPM variable quantity symbol)
Wherein, RPM increment sign is plus sige (+) or minus sign (-).
As shown in Figure 6, control unit 300 can be configured to keep the pressure of transmission clutch 42, so that the transmitting torque of transmission clutch 42 becomes demand torque.In addition, control unit 300 can be configured to: step S140 with carry out operating motor 20 in the corresponding target velocity of current driving pattern when transmission clutch 42 controlled of sliding.In the time of control unit 300 operating motor 20, control unit 300 can be configured to discharge at step S150 the pressure that is provided for engine clucht 30, to disconnect engine clucht 30.In the time that engine clucht 30 disconnects, control unit 300 can be configured at step S160, the speed of electrical motor 30 be synchronizeed with the input speed of transmission clutch 42 (or input speed of change-speed box 40).
Control unit 300 can be configured to be set to the drive shaft speed of change-speed box 40 and the summation of RPM object variations amount in the target velocity of step S140 electrical motor 20.RPM object variations amount can be that the state based on demand torque and engine clucht 30 arranges.The symbol of RPM variable quantity according to demand torque arranges.For example, in the time that driving mode is switched to the RB pattern that produces negative demand torque, the symbol of RPM variable quantity can be negative value.
In exemplary embodiment of the present invention, for example, as shown in Figure 7, control unit 300 can be configured to carry out feedback operation (feedback-operate) electrical motor 20 by proportion of utilization integration control unit.
As shown in Figure 7, driver's demand torque can provide by feedforward (feed-forward).Therefore, can change driving mode (for example, HEV pattern->EV pattern), prevent from producing vibrations simultaneously in disconnection engine clucht process.
Although the present invention is described in conjunction with each embodiment that is regarded as at present exemplary embodiment, but should be understood that, the present invention is not limited to the disclosed embodiments, on the contrary, the invention is intended to cover the various amendments in the spirit and scope that are included in appended claims and the layout being equal to.

Claims (20)

1. control a method for the driving mode conversion of vehicle, described vehicle comprises the engine clucht and the transmission clutch that is connected described electrical motor and input shaft of the transmission of power between control engine and electrical motor, and described method comprises:
Detect the driving mode conversion of described vehicle by controller;
When the conversion of described driving mode is just when processed, determine by described controller whether the state of described engine clucht is transformed into off-state from lock-out state; And
In the time that the state of described engine clucht is confirmed as being transformed into described off-state from described lock-out state, by described controller to the control of sliding of described engine clucht, to prevent that the torque producing is passed to the axle drive shaft that is connected in described change-speed box in the time that described engine clucht is switched to described off-state.
2. the method for claim 1, also comprises:
Operate described electrical motor by described controller with the target velocity corresponding with described driving mode photograph; And
By operating described electrical motor, the speed of described electrical motor and the input speed of described transmission clutch are synchronizeed by described controller.
3. method as claimed in claim 2, wherein in the time that the state of described engine clucht is confirmed as being transformed into described off-state from described lock-out state, described driving mode conversion is from HEV(hybrid electric vehicle) pattern is to EV(battery-driven car) conversion of pattern.
4. method as claimed in claim 2, wherein in the time that the state of described engine clucht is confirmed as being transformed into described off-state from described lock-out state, described driving mode conversion is from HEV(hybrid electric vehicle) pattern is to RB(regenerative brake) conversion of pattern.
5. method as claimed in claim 2, wherein when described transmission clutch is during in sliding mode, independently independently controls the torque of described transmission clutch with the torque of described engine clucht and described electrical motor.
6. method as claimed in claim 2, wherein, in the time that the slip of described transmission clutch is controlled, described electrical motor and described transmission clutch are controlled so as to slip transmitting torque, driving torque and the torque of driver's demand of described transmission clutch are equated.
7. method as claimed in claim 2, wherein the target velocity of described electrical motor is set to the drive shaft speed of described transmission clutch and the summation of RPM object variations amount, and wherein said RPM object variations amount is to arrange based on the state of demand torque and described engine clucht.
8. method as claimed in claim 2, is wherein controlled to the pressure that offers described transmission clutch the transmitting torque of described transmission clutch and described demand torque is equated.
9. method as claimed in claim 3, wherein, in the time that described driving mode is transformed into RB pattern from described HEV pattern, described demand torque becomes negative torque.
10. a system of changing for controlling the driving mode of vehicle, described system comprises:
Engine clucht, it is configured to the transmission of power between control engine and electrical motor;
Transmission clutch, it is configured to connect the input shaft of described electrical motor and described change-speed box, and wherein said transmission clutch is arranged in described change-speed box; And
Controller, it is configured to:
Detect the driving mode conversion of described vehicle;
When the conversion of described driving mode is just when processed, determine whether the state of described engine clucht is transformed into off-state from lock-out state; And
In the time that the state of described engine clucht is confirmed as being transformed into described off-state from described lock-out state, to the control of sliding of described engine clucht, to prevent that the torque producing is passed to the axle drive shaft that is connected in described change-speed box in the time that described engine clucht is switched to described off-state.
11. systems as claimed in claim 10, wherein said controller is also configured to:
Operate described electrical motor with the target velocity corresponding with described driving mode photograph; And
By operating described electrical motor so that the speed of described electrical motor and the input speed of described transmission clutch synchronize.
12. systems as claimed in claim 11, wherein in the time that the state of described engine clucht is confirmed as being transformed into described off-state from described lock-out state, described driving mode conversion is from HEV(hybrid electric vehicle) pattern is to EV(battery-driven car) conversion of pattern.
13. systems as claimed in claim 11, wherein in the time that the state of described engine clucht is confirmed as converting described off-state to from described lock-out state, described driving mode conversion is from HEV(hybrid electric vehicle) pattern is to RB(regenerative brake) conversion of pattern.
14. systems as claimed in claim 11, wherein when described transmission clutch is during in sliding mode, independently independently control the torque of described transmission clutch with the torque of described engine clucht and described electrical motor.
15. systems as claimed in claim 11, wherein, in the time that the slip of described transmission clutch is controlled, described electrical motor and described transmission clutch are controlled so as to slip transmitting torque, driving torque and the torque of driver's demand of described transmission clutch are equated.
16. systems as claimed in claim 11, wherein the target velocity of described electrical motor is set to the drive shaft speed of described transmission clutch and the summation of RPM object variations amount, and wherein said RPM object variations amount is that the state based on demand torque and described engine clucht arranges.
17. systems as claimed in claim 11, the pressure that wherein offers described transmission clutch is controlled so as to the transmitting torque of described transmission clutch is equated with described demand torque.
18. systems as claimed in claim 12, wherein when described driving mode is transformed into RB(regenerative brake from described HEV pattern) when pattern, described demand torque becomes negative torque.
19. 1 kinds of non-of short duration computer-readable mediums, comprise the programmed instruction of being carried out by treater or controller, and described computer-readable medium comprises:
Detect the programmed instruction of the driving mode conversion of vehicle;
Just when processed, determine the state of described engine clucht when the conversion of described driving mode and whether be transformed into the programmed instruction of off-state from lock-out state; And
In the time that the state of described engine clucht is confirmed as being transformed into described off-state from described lock-out state, to the control of sliding of described engine clucht, to prevent that the torque producing is passed to the programmed instruction of the axle drive shaft that is connected in described change-speed box in the time that described engine clucht is switched to described off-state.
20. non-of short duration computer-readable mediums as claimed in claim 19, also comprise:
Operate the programmed instruction of described electrical motor with the target velocity corresponding with described driving mode photograph; And
The programmed instruction that the speed of described electrical motor and the input speed of described transmission clutch is synchronizeed by operating described electrical motor.
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